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The German armored cruisers SMS Scharnhorst and Gneisenau - part of the German East Asia Squadron and under the command of Admiral Maximilian Graf von Spee - arrived in Papeete, on the island of Tahiti in French Oceania. They proceeded to bombard the port, sinking a gunboat and a freighter, and destroying several buildings. The cruisers then moved on to the coast off Chile, where they would rendezvous with the other ships of the East Asia Squadron in late October.in wikipedia

The British West Indies Squadron of Rear-Admiral Sir Christopher Cradock sailed from Coronel, Chile, expecting to intercept a lone German light cruiser, but instead encountered the full force of the German East Asia Squadron under Vice-Admiral Graf Maximilian von Spee. The five more modern cruisers of the German squadron outclassed the four older British cruisers; in the five hour battle which followed, the Germans sank both British armored cruisers present - killing all 1,570 crew, including Cradock - for the loss of only three men wounded.in wikipedia

The German East Asia Squadron of Admiral Graf Maximilian von Spee made an attempt to raid the Falkland Islands after rounding Cape Horn en route from China to Germany, but was surprised by a superior British naval squadron under Vice Admiral Doveton Sturdee which was coaling in Stanley harbor. The two battlecruisers, three armored cruisers, and two light cruisers of the British destroyed the German squadron of two armored crusiers and three light cruisers, killing von Spee and 1,871 men in the process. Only the German light cruiser Dresden managed to escape.in wikipedia

Three British cruisers located the light cruiser SMS Dresden - last remnant of the German East Asia Squadron - at harbor in Cumberland Bay, Más a Tierra (Selkirk Island), off the coast of Chile - and opened fire. Believing the situation hopeless, German Captain Lüdecke sent Lt. Wilhelm Canaris to negotiate surrender terms. While negotiations were underway, Lüdecke scuttled his vessel and escaped ashore with the rest of his crew.in wikipedia

Ecuador and Colombia signed the Muñoz Vernaza-Suárez Treaty, ending their border dispute. The treaty was criticized in Ecuador as it ceded considerable northeastern territory the nation had long claimed while failing to secure an alliance between the signatories. Peru protested the treaty as it also claimed most of the land involved.in wikipedia

On 2 April 1917, United States President Woodrow Wilson asked a special joint session of the US Congress to declare war on the German Empire. Congress obliged by declaring war on the 6th, with the resolution passing 82 to 6 in the Senate and 373 to 50 in the House.in wikipedia

The day after the United States declared war on Germany, Panama and Cuba followed suit and entered World War I. Over a year later - in April 1918 - Guatemala also joined the Allies, followed by Nicaragua and Costa Rica in May, and Haiti and Honduras in July.in wikipedia

In response to the repeated sinking of Brazilian merchant ships by German submarines, Brazilian President Venceslau Brás declared war against the Central Powers. Brazil would become the only Latin American country to be directly involved in World War I; its main contribution would be the Brazilian Navy, which helped patrol parts of the Atlantic Ocean. Brazil would also send a preparatory military mission of 20 officers to the Western Front in mid-1918, but the war would end before further forces could be sent.in wikipedia

On 7 November (25 October Old Style) 1917, Bolshevik Red Guards, led by Leon Trotsky, mounted an armed insurrection in Petrograd, capital of the Russian Republic, capturing several government buildings. The following day they seized the Winter Palace, the seat of Alexander Kerensky’s Provisional Government. The Bolsheviks declared a new government, the Council of People’s Commissars, with Vladimir Lenin as its head. Simultaneously and over the following days, other Bolshevik uprisings took place in towns and cities across Russia.in wikipedia